Fix firefox is already running but is not responding

End Firefox processes

If Firefox did not shut down normally when you last used it, Firefox might still be running in the background, even though it is not visible.

If you try to open it while it's running, an error message will appear with the option to click Close Firefox. If that doesn't solve the problem, restart your computer or try the following options.

Use the Windows Task Manager to close the existing Firefox process

1. Right-click on an empty spot in the Windows task bar and select Task Manager (or press Ctrl+Shift+Esc).
2. When the Windows Task Manager opens, select the Processes tab.

    3. Select the entry for firefox.exe (press F on the keyboard to find it) and click 

End Process.

4. Click Yes in the "Task Manager Warning" dialog that appears.

              5. Repeat the above steps to end any additional firefox.exe process, if more than one                       entry is found, then exit the Windows Task Manager.

              6. Start Firefox normally.

Initialize the connection to a file share

If you store the profile on a file share, try accessing the file share beforehand using Windows Explorer.

Call  +1-856-514-8666 for more help and support to fix firefox is already running but is not responding.